WorksheetsChem Unit 3
Total questions: 25
Worksheet time: 28mins
Fe3N2
nonpolar covalent bond
ionic bond
polar covalent bond
coordinate covalent bond
VSEPR shape predictions account for the fact that
VSEPR shapes are based on the assumption that
Which statement is true based on the electronegativity difference?
When the END is greater than 1.7 atoms form a covalent bond.
The END has no effect on the type of bond formed between two atoms.
As the END increases, the polarity of the bond increases.
If the END between two atoms is 0.2, the bond between the two atoms will be polar.
What is the following compound classified as?
non-polar covalent
polar covalent
ionic
metallic
According to VSEPR theory, what is the shape of the water molecule (H2O)?
Linear
Trigonal planar
Bent
Tetrahedral
When drawing a Lewis Structure, the central atom is generally the one with the:
most electrons
highest atomic number
least electronegativity
Which substance has the weakest intermolecular forces?
Substance A, boiling point of 75 °C
Substance B, boiling point of 105 °C
Substance C, boiling point of 25 °C
Substance D, boiling point of 45 °C
dipole dipole
H-bond
London dispersion forces
metallic
________________________ have the strongest intermolecular forces of attraction.
Dipole-Dipole
Dispersion
Hydrogen Bonds
The octet rules states that most elements want to have _____ valence electrons.
2
4
6
8
Why does an atom tend to chemically bond with another atom?
To become more stable
To remain on its present state
To maintain its energy
To decrease its stability
What is wrong with this picture?
Metals should only have positive cations
Anions should be larger than cations
Cations should be larger than anions
Does not accurately represent density of the compound
What is the bond angle of CH4?
180
120
109.5
90
A molecule that is trigonal planar will have a bond angle of approximately:
180
120
109.5
90
Which of the following pairs would form a covalent bond?
Mg-H
Mg-O
O-H
Mg-Mg
Which of the following is an accurate representation of the particulate diagram shown
ionic compound
covalent molecule
interstitial alloy
pure metal
Which of the following is correct?
Conducts electricity because it is made of ions
Conducts electricity because it is made of particles of different sizes
Does not conduct electricity because ions cannot move freely
Does not conduct electricity because there are spaces between the particles
Which of the following is a polar molecule?
CF4
C2H2
CH2O
CH4
